Abstract:
PURPOSE: An electrode catalyst for fuel cell is provided to commercialize a polymer electrolyte membrane fuel cell by effectively replacing an expensive platinum electrode catalyst. CONSTITUTION: An electrode catalyst for fuel cell comprises a tungsten carbide/carbon complex carrier and a catalyst component dipped on the carrier. The catalyst component comprises palladium and at least one kind of other metal catalyst component is selected from the group consisting of nickel, gold, and iron and silver. The tungsten carbide/carbon complex carrier includes carbide crystal particles with an island phase and has a sea phase where carbon surrounds the crystal particles.
Abstract:
PURPOSE: A manufacturing method of a metal suboxide is provided to synthesize the metal suboxide which has large specific surface area by forming a polymer on the surface of a metal suboxide precursor with reacting an aromatic compound which is substituted to a hydroxy radical and a connection precursor. CONSTITUTION: A metal suboxide has more than 1.5m^2/g of a specific surface area. The metal suboxide includes less than 1 weight% of carbon base on the total weight of the metal suboxide. The metal comprises a transition metal, a post-transition metal, and one selected from a combination thereof. The metal suboxide comprises pore. The manufacturing method of the metal suboxide comprises the following steps. A mixture which includes a metal suboxide precursor (1), aromatic compound which is substituted to a hydroxy radical (3), and a connection precursor is manufactured. The polymer (13') is formed on the surface of the metal suboxide precursor by reacting the aromatic compound which is substituted to a hydroxy radical and the connection precursor. The polymer is heat treated. A carbon is removed from the polymer. In the step of manufacturing the mixture which includes a metal suboxide precursor, aromatic compound which is substituted to a hydroxy radical, and a connection precursor; the connection precursor comprises one selected from C1 to C30 aldehyde, C3 to C30 ketone, and combination thereof.
Abstract:
PURPOSE: An electrode catalyst for a fuel cell membrane-electrode assembly is provided to have high hydrogen oxidation activity by the rise of catalyst components and a synergy between palladium and tungsten carbide without using a platinum catalyst of high cost. CONSTITUTION: An electrode catalyst for a fuel cell membrane-electrode assembly comprises tungsten carbide and catalyst component. The catalyst component comprises Pd and another metal catalyst component. The another metal component is one or more mixtures selected from a group consisting of Ni, Ir, Co, Mn, Au, Fe, and Ag. The tungsten carbide has the specific surface area of 10-30 m/g. The content of the tungsten carbide is 60-95 weight% on the basis of total weight of the catalyst. The content of the catalyst component is 5-40 weight%.
Abstract:
전기화학적 활성이 백금과 비교할 수 있을 정도이면서 훨씬 저렴한 연료전지용 전극촉매, 및 이 전극촉매를 포함하는 막 전극 접합체와 연료전지가 제시된다. 상기 연료전지용 전극촉매는 텅스텐 카바이드/탄소 메소포러스 복합 담체 상에 팔라듐 및 선택적으로 니켈 또는 금이 담지된 구조를 갖는다.
Abstract:
The present invention relates to a cathode catalyst of a polymer electrolyte fuel cell and a method for manufacturing the same and, more specifically, to a cathode catalyst of a polymer electrolyte fuel cell including a carbon nanotube-graphene composite immersed with titanium nitride (TiN), and a method for manufacturing the same. The cathode catalyst of a polymer electrolyte fuel cell according to the present invention is cheap in price, stable, and has a high reduction capacity, at the same time having a high activity in both onset potential and current during an oxygen reduction reaction occurring in the cathode of the polymer electrolyte fuel cell, thus can be effectively utilized as a cathode of the polymer electrolyte fuel cell. Moreover, the manufacturing process of the catalyst is simple. The catalyst manufactured according to the present invention can be effectively used as a cathode catalyst of a polymer electrolyte fuel cell adapted to power sources at home and transportations such as automobiles.
Abstract:
본 발명은 고분자 전해질 연료전지의 양극 촉매 및 이의 제조방법에 관한 것으로, 보다 상세하게는 탄소나노튜브 및 그래핀을 포함하는 촉매 지지체에 티타늄 질화물(TiN)을 포함하는 촉매 활성 성분이 담지된 고분자 전해질 연료전지의 양극 촉매, 및 탄소나노튜브(CNT)와 그래핀 옥사이드를 용매에 혼합하여 촉매 지지체를 포함하는 혼합 용액을 제조하는 단계; 티타늄염을 용매에 혼합하여 촉매 활성 성분을 포함하는 혼합 용액을 제조하는 단계; 상기 촉매 지지체를 포함하는 혼합 용액 및 상기 촉매 활성 성분을 포함하는 혼합 용액을 혼합하고, 질소원을 첨가하여 티타늄-질소원 복합체와 결합된 촉매 지지체를 포함하는 용액을 제조하는 단계; 및 750 내지 800℃의 온도에서 질소 소성하여 티타늄 질화물이 담지된 탄소나노튜브-그래핀 복합체(CNT-graphene composite)를 획득하는 단계를 포함하는, 고분자 전해질 연료전지의 양극 촉매의 제조방법에 관한 것이다. 본 발명의 고분자 전해질 연료전지의 양극 촉매는 고분자 전해질 연료전지의 양극에서 일어나는 산소 환원 반응에 있어서 높은 개시전위(onset potential) 및 높은 전류(current)를 포함하는 높은 활성을 나타내면서도 가격이 저렴하며, 안정적이고, 높은 환원 능력을 지니므로, 고분자 전해질 연료전지의 양극으로 유용하게 활용될 수 있다. 또한 촉매의 제조 과정이 단순하여 제조가 용이한 장점도 갖는다. 본 발명에 의해 제조된 촉매는 자동차 등과 같은 수송용 및 가정용 전원에 적합한 고분자 전해질 연료전지의 양극 촉매로 유용하게 사용될 수 있다.